11 Given (4 + 5x) + 9x = 4 + (5x + 9x) which conclusion is true? A The expressions are equivalent.
B The expressions are not equivalent.
C It cannot be determined if the expressions are equivalent.
D The expressions are not equivalent.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

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